Slow read performance on HP StoreAll Storage Server

Symptom

Library operations such as Synthetic Full, auxiliary copy, or restore suffer slow read performance when using CIFS paths from HP StoreAll Storage using Ibrix file system. Jobs take a long time to complete.

Cause

Ibrix file system's "enable_oplocks" setting is set to true/enabled on the active Fusion Manager (FM) settings. However, it is set to false/disabled at the nodes HP-SMB/CIFS stack registry on all File Serving Nodes (FSNs). This inconsistency between FM and FSN settings has strong impact on performance of some type of read workloads.

Resolution

On all FSNs :

1) Verify EnableOplocks is set to 0 (e.g. false) with the following command: